16569 + Interview Questions in Physics

1.	When a body vibrates under a periodic force, the vibrations of the body are : (a) natural vibrations (b) damped vibrations (c) forced vibrations (d) resonant vibrations.
Answer» When a body vibrates under a periodic force, the vibrations of the body are : (a) natural vibrations (b) damped vibrations (c) forced vibrations (d) resonant vibrations.

1.

When a body vibrates under a periodic force, the vibrations of the body are : (a) natural vibrations (b) damped vibrations (c) forced vibrations (d) resonant vibrations.

Answer»

When a body vibrates under a periodic force, the vibrations of the body are :

(a) natural vibrations (b) damped vibrations

(c) forced vibrations (d) resonant vibrations.

2.	Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation.
Answer» Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation.

Discussion

3.	A gas at 300 K has some volume. At what temperature, will it become half this volume?
Answer» A gas at 300 K has some volume. At what temperature, will it become half this volume?

Discussion

4.	If the above bar magnet is broken along the middle line, then how many north poles and south poles are formed?
Answer» If the above bar magnet is broken along the middle line, then how many north poles and south poles are formed?

Discussion

5.	Why magnetic field lines follow curve path ?
Answer» Why magnetic field lines follow curve path ?

Discussion

6.	how exactly does earth act as a big magnet.give me the actual concept
Answer» how exactly does earth act as a big magnet.give me the actual concept

Discussion

7.	What is the resistance between A and B in the figure given below?
Answer» What is the resistance between A and B in the figure given below?

Discussion

8.	The Principle of CALORIMETRY or MIXTURES states that when a hot body comes in contact with a cold body :
Answer» The Principle of CALORIMETRY or MIXTURES states that when a hot body comes in contact with a cold body :

Discussion

9.	The solar energy reaching unit area at outer edge of the earth's atmosphere exposed perpendicularly to the rays of the Sun at the average distance between the Sun and earth is known as
Answer» The solar energy reaching unit area at outer edge of the earth's atmosphere exposed perpendicularly to the rays of the Sun at the average distance between the Sun and earth is known as

Discussion

10.	What will technically happen if AC current enters an electrical appliance which uses DC current?
Answer» What will technically happen if AC current enters an electrical appliance which uses DC current?

Discussion

11.	Q. Mention the usual current rating of the fuse wire in the line to (I) light and fan (ii) appliance of 2kw or more power
Answer» Q. Mention the usual current rating of the fuse wire in the line to (I) light and fan (ii) appliance of 2kw or more power

Discussion

12.	Q47. With reference to Li-Fi technology, consider the following statements: 1. It is a bidirectional technology that uses LEDs to transmit data using wires. 2. Its speed is faster than the speed of Wi-Fi. Select the correct answer using the codes given.
Answer» Q47. With reference to Li-Fi technology, consider the following statements: 1. It is a bidirectional technology that uses LEDs to transmit data using wires. 2. Its speed is faster than the speed of Wi-Fi. Select the correct answer using the codes given.

12.

Q47. With reference to Li-Fi technology, consider the following statements: 1. It is a bidirectional technology that uses LEDs to transmit data using wires. 2. Its speed is faster than the speed of Wi-Fi. Select the correct answer using the codes given.

Answer»

Q47. With reference to Li-Fi technology, consider the following statements:

1. It is a bidirectional technology that uses LEDs to transmit data using wires.

2. Its speed is faster than the speed of Wi-Fi.

Select the correct answer using the codes given.

Discussion

13.	A ring has a total mass m but non-uniformly distributed over its circumference. The radius of the ring is R. A point mass m is placed at the center of the ring. Work done in taking away this point mass from center to infinity is
Answer» A ring has a total mass m but non-uniformly distributed over its circumference. The radius of the ring is R. A point mass m is placed at the center of the ring. Work done in taking away this point mass from center to infinity is

Discussion

14.	What is heating effect of electric current?
Answer» What is heating effect of electric current?

Discussion

15.	Fill in the following blanks with suitable words : (a) The lines of .........round a straight current-carrying conductor are in the shape of ........... (b) For a current-carrying solenoid, the magnetic field is like that of a ........... (c) The magnetic effect of a coil can be increased by increasing the number of ...........,increasing the .............or inserting an ............ core. (d) If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole. (e) If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ........pole.
Answer» Fill in the following blanks with suitable words : (a) The lines of .........round a straight current-carrying conductor are in the shape of ........... (b) For a current-carrying solenoid, the magnetic field is like that of a ........... (c) The magnetic effect of a coil can be increased by increasing the number of ...........,increasing the .............or inserting an ............ core. (d) If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole. (e) If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ........pole.

15.

Fill in the following blanks with suitable words : (a) The lines of .........round a straight current-carrying conductor are in the shape of ........... (b) For a current-carrying solenoid, the magnetic field is like that of a ........... (c) The magnetic effect of a coil can be increased by increasing the number of ...........,increasing the .............or inserting an ............ core. (d) If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole. (e) If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ........pole.

Answer»

Fill in the following blanks with suitable words :

(a) The lines of .........round a straight current-carrying conductor are in the shape of ...........

(b) For a current-carrying solenoid, the magnetic field is like that of a ...........

(c) The magnetic effect of a coil can be increased by increasing the number of ...........,increasing the .............or inserting an ............ core.

(d) If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole.

(e) If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ........pole.

Discussion

16.	Methane can be harvested from
Answer» Methane can be harvested from

Discussion

17.	State whether true or false: An electron is a point charge.
Answer» State whether true or false: An electron is a point charge.

Discussion

18.	If M is the mass of a nucleus and A its atomic mass, then the packing fraction is
Answer» If M is the mass of a nucleus and A its atomic mass, then the packing fraction is

Discussion

19.	Light travels through a glass plate of thickness t and refractive index n. If c is the velocity of light in vacuum, then the time taken by light to travel the thickness of the plate will be:
Answer» Light travels through a glass plate of thickness $t$ and refractive index $n$ . If $c$ is the velocity of light in vacuum, then the time taken by light to travel the thickness of the plate will be:

Discussion

20.	Question 10 Medicine is packed in boxes, each weighing 4 kg 500 g. How many such boxes can be loaded in a van which cannot carry beyond 800 kg?
Answer» Question 10 Medicine is packed in boxes, each weighing 4 kg 500 g. How many such boxes can be loaded in a van which cannot carry beyond 800 kg?

Discussion

21.	Given the following molar conductivites at 25∘ C; HCl=426Ω−1 cm2 mol−1; NaCl=126Ω−1 cm2 mol−1, NaCro (sodium crotonate) =83Ω−1 cm2 mol−1. The conductivity of 0.001 mol/dm3 acid solution is 3.83×10−5Ω−1 cm−1. The dissociation constant of crotonic acid is
Answer» Given the following molar conductivites at $25^{\circ} C$ ; $H C l = 426 Ω^{- 1} c m^{2} m o l^{- 1}$ ; $N a C l = 126 Ω^{- 1} c m^{2} m o l^{- 1}$ , NaCro (sodium crotonate) $= 83 Ω^{- 1} c m^{2} m o l^{- 1}$ . The conductivity of $0.001 m o l / d m^{3}$ acid solution is $3.83 \times 10^{- 5} Ω^{- 1} c m^{- 1}$ . The dissociation constant of crotonic acid is

Discussion

22.	Resistors R1, R2 and R3 having values 5 Ω, 10 Ω, and 30 Ω respectively are connected in parallel across a battery of 12 volts. Calculate (a) the current through each resistor (b) the total current in the circuit and (c) the total circuit resistance
Answer» Resistors $R_{1}$ , $R_{2}$ and $R_{3}$ having values 5 $Ω$ , 10 $Ω$ , and 30 $Ω$ respectively are connected in parallel across a battery of 12 volts. Calculate (a) the current through each resistor (b) the total current in the circuit and (c) the total circuit resistance

22.

Resistors R1, R2 and R3 having values 5 Ω, 10 Ω, and 30 Ω respectively are connected in parallel across a battery of 12 volts. Calculate (a) the current through each resistor (b) the total current in the circuit and (c) the total circuit resistance

Answer»

Resistors $R_{1}$ , $R_{2}$ and $R_{3}$ having values 5 $Ω$ , 10 $Ω$ , and 30 $Ω$ respectively are connected in parallel across a battery of 12 volts. Calculate

(a) the current through each resistor

(b) the total current in the circuit and

(c) the total circuit resistance

Discussion

23.	A cannon ball has a mass of 2 kg is fired at a target of 500 meters away. The 400 kg cannon recoils by 50 cm. Assuming cannon ball moves with constant velocity, when will it hit the target? (Resistance offered by ground to cannon is 100 N)
Answer» A cannon ball has a mass of 2 kg is fired at a target of 500 meters away. The 400 kg cannon recoils by 50 cm. Assuming cannon ball moves with constant velocity, when will it hit the target? (Resistance offered by ground to cannon is 100 N)

Discussion

24.	In which pH range our body works?
Answer» In which pH range our body works?

Discussion

25.	Question 13 The resistivity does not change if (a) the material is changed (b) the temperature is changed (c) the shape of the resistor is changed (d) both material and temperature are changed
Answer» Question 13 The resistivity does not change if (a) the material is changed (b) the temperature is changed (c) the shape of the resistor is changed (d) both material and temperature are changed

Discussion

26.	Difference between voltage and electric current. Are they equal or same?
Answer» Difference between voltage and electric current. Are they equal or same?

Discussion

27.	A body ‘A’ has 45 p+ and 52e- And a body B has 70p+ and 63e-. After friction find the total number of charge transferred between them and also find the charge before friction
Answer» A body ‘A’ has 45 p+ and 52e- And a body B has 70p+ and 63e-. After friction find the total number of charge transferred between them and also find the charge before friction

Discussion

28.	Which of the following mirror(s) have curved reflecting surfaces?
Answer» Which of the following mirror(s) have curved reflecting surfaces?

Discussion

29.	Name the S.I. unit of electrical energy. How is it related to Wh?
Answer» Name the S.I. unit of electrical energy. How is it related to Wh?

Discussion

30.	Demonstrate the phenomenon of scattering with a help of an activity
Answer» Demonstrate the phenomenon of scattering with a help of an activity

Discussion

31.	How do I solve earthing circuit diagrams?
Answer» How do I solve earthing circuit diagrams?

Discussion

32.	How is steam produced by fission of nuclei of uranium or plutonium ?
Answer» How is steam produced by fission of nuclei of uranium or plutonium ?

Discussion

33.	If the resistivity of a substance changes with temperature then why do we term it as a constant.
Answer» If the resistivity of a substance changes with temperature then why do we term it as a constant.

Discussion

34.	What is the difficulty faced by the mountaineers with respect to the air present around them?
Answer» What is the difficulty faced by the mountaineers with respect to the air present around them?

Discussion

35.	The minimum speed of wind necessary for a small windmill to rotate and produce electricity is
Answer» The minimum speed of wind necessary for a small windmill to rotate and produce electricity is

Discussion

36.	Refractive Index of diamond is 2.4. What do you understand by this statement?
Answer» Refractive Index of diamond is 2.4. What do you understand by this statement?

Discussion

37.	Question 3 An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be - (a) 100 W (b) 75 W (c) 50 W (d) 25 W
Answer» Question 3 An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be - (a) 100 W (b) 75 W (c) 50 W (d) 25 W

Discussion

38.	Complete the following sentences : (a) Mechanical advantage = ............ × velocity ratio (b) In class II leer, effort arm is ........ than the load arm. (c) A scissors is a ........ multiplier
Answer» Complete the following sentences : (a) Mechanical advantage = ............ $\times$ velocity ratio (b) In class II leer, effort arm is ........ than the load arm. (c) A scissors is a ........ multiplier

38.

Complete the following sentences : (a) Mechanical advantage = ............ × velocity ratio (b) In class II leer, effort arm is ........ than the load arm. (c) A scissors is a ........ multiplier

Answer»

Complete the following sentences :

(a) Mechanical advantage = ............ $\times$ velocity ratio

(b) In class II leer, effort arm is ........ than the load arm.

(c) A scissors is a ........ multiplier

Discussion

39.	If fifty pounds of force stretches a spring by five inches, how much will the spring be stretched by a force of 120 pounds?
Answer» If fifty pounds of force stretches a spring by five inches, how much will the spring be stretched by a force of 120 pounds?

Discussion

40.	The value of current flowing in a given resistor for the corresponding values of potential difference across the resistor are given below: I: 0.5, 1.0, 2.0, 3.0, 4.0 V: 1.6, 3.4, 6.7, 10.2, 13.2 Calculate the resistance of the resistor.
Answer» The value of current flowing in a given resistor for the corresponding values of potential difference across the resistor are given below: I: 0.5, 1.0, 2.0, 3.0, 4.0 V: 1.6, 3.4, 6.7, 10.2, 13.2 Calculate the resistance of the resistor.

40.

The value of current flowing in a given resistor for the corresponding values of potential difference across the resistor are given below: I: 0.5, 1.0, 2.0, 3.0, 4.0 V: 1.6, 3.4, 6.7, 10.2, 13.2 Calculate the resistance of the resistor.

Answer»

The value of current flowing in a given resistor for the corresponding values of potential difference across the resistor are given below:

I: 0.5, 1.0, 2.0, 3.0, 4.0

V: 1.6, 3.4, 6.7, 10.2, 13.2

Calculate the resistance of the resistor.

Discussion

41.	In a cricket match a fielder has to catch a fast moving ball by moving his hand along with the ball. Why? (a) In order to reduce the kinetic energy of the ball (b) In order to reduce the impact force on the hand by increasing the time for momentum change. (c) In order to exhibit the Law of Inertia (d) In order to get better grip on the ball.
Answer» In a cricket match a fielder has to catch a fast moving ball by moving his hand along with the ball. Why? (a) In order to reduce the kinetic energy of the ball (b) In order to reduce the impact force on the hand by increasing the time for momentum change. (c) In order to exhibit the Law of Inertia (d) In order to get better grip on the ball.

Discussion

42.	Two properties common to gamma radiations and visible light are:
Answer» Two properties common to gamma radiations and visible light are:

Discussion

43.	A person buys two electrical devices P and Q for lightening purposes in his house. The device P consumes only 5 units of electricity in a month but the device Q consumes 15 units of electricity in a month when used for the same number of hours daily. The device Q wastes a lot of electricity by radiating energy C but P does not do so, (a) What type of device is (i) P, and (ii) Q? (b) Name one component which is present in Q but not in P. (c) Name the energy C. (d) Which device is more energy efficient: P or Q? (e) Which fossil fuel is most likely to be conserved if all of us switch over to devices like P?
Answer» A person buys two electrical devices P and Q for lightening purposes in his house. The device P consumes only 5 units of electricity in a month but the device Q consumes 15 units of electricity in a month when used for the same number of hours daily. The device Q wastes a lot of electricity by radiating energy C but P does not do so, (a) What type of device is (i) P, and (ii) Q? (b) Name one component which is present in Q but not in P. (c) Name the energy C. (d) Which device is more energy efficient: P or Q? (e) Which fossil fuel is most likely to be conserved if all of us switch over to devices like P?

Discussion

44.	In the arrangement shown in Figure, there are two coils wound on a non-conducting cylindrical rod. Initially, the key is not inserted. Then the key is inserted and later removed. Then
Answer» In the arrangement shown in Figure, there are two coils wound on a non-conducting cylindrical rod. Initially, the key is not inserted. Then the key is inserted and later removed. Then

44.

In the arrangement shown in Figure, there are two coils wound on a non-conducting cylindrical rod. Initially, the key is not inserted. Then the key is inserted and later removed. Then

Answer»

In the arrangement shown in Figure, there are two coils wound on a non-conducting cylindrical rod. Initially, the key is not inserted. Then the key is inserted and later removed. Then

Discussion

45.	If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combinations is: (a) 0.1 Ω (b) 10 Ω (c) 20 Ω (d) 40 Ω
Answer» If two resistors of $25 Ω$ and $15 Ω$ are joined together in series and then placed in parallel with a $40 Ω$ resistor, the effective resistance of the combinations is: (a) 0.1 $Ω$ (b) 10 $Ω$ (c) 20 $Ω$ (d) 40 $Ω$

Discussion

46.	The use of one of the following is eco-friendly. This one is: (a) cars for transportation (b) polybags for shopping (c) windmills for generating power (d) dyes for colouring clothes
Answer» The use of one of the following is eco-friendly. This one is: (a) cars for transportation (b) polybags for shopping (c) windmills for generating power (d) dyes for colouring clothes

Discussion

47.	In the circuit given below: (a) What is the combined resistance? (b) What is the p.d. across the combined resistance? (c) What is the p.d. across the 3Ω resistor? (d) What is the current in the 3 resistor? (e) What is th current in the 6Ω resistor?
Answer» In the circuit given below: (a) What is the combined resistance? (b) What is the p.d. across the combined resistance? (c) What is the p.d. across the $3 Ω$ resistor? (d) What is the current in the 3 resistor? (e) What is th current in the $6 Ω$ resistor?

Discussion

48.	A p.d. of 4 V is applied to two resistors of 6Ω and 2Ω connected in series. Calculate: (a) the combined resistance (b) the current flowing (c) the p.d. across the 6Ω resistor.
Answer» A p.d. of 4 V is applied to two resistors of $6 Ω$ and $2 Ω$ connected in series. Calculate: (a) the combined resistance (b) the current flowing (c) the p.d. across the $6 Ω$ resistor.

Discussion

49.	In the diagram below, PQ is a ray of light incident on a rectangular glass block. In the diagram, the angle of incidence is marked by letter 'i' and the angle of emergence by the letter 'e’. How are the angles' i’ and 'e’ related to each other?
Answer» In the diagram below, PQ is a ray of light incident on a rectangular glass block. In the diagram, the angle of incidence is marked by letter 'i' and the angle of emergence by the letter 'e’. How are the angles' i’ and 'e’ related to each other?

49.

In the diagram below, PQ is a ray of light incident on a rectangular glass block. In the diagram, the angle of incidence is marked by letter 'i' and the angle of emergence by the letter 'e’. How are the angles' i’ and 'e’ related to each other?

Answer»

In the diagram below, PQ is a ray of light incident on a rectangular glass block.

In the diagram, the angle of incidence is marked by letter 'i' and the angle of emergence by the letter 'e’.

How are the angles' i’ and 'e’ related to each other?

Discussion

50.	Name the factors on which the heat produced in a wire depends when current is passed in it and state how does it depend on the factors stated by you.
Answer» Name the factors on which the heat produced in a wire depends when current is passed in it and state how does it depend on the factors stated by you.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

When a body vibrates under a periodic force, the vibrations of the body are : (a) natural vibrations (b) damped vibrations (c) forced vibrations (d) resonant vibrations.

Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation.

A gas at 300 K has some volume. At what temperature, will it become half this volume?

If the above bar magnet is broken along the middle line, then how many north poles and south poles are formed?

Why magnetic field lines follow curve path ?

how exactly does earth act as a big magnet.give me the actual concept

What is the resistance between A and B in the figure given below?

The Principle of CALORIMETRY or MIXTURES states that when a hot body comes in contact with a cold body :

The solar energy reaching unit area at outer edge of the earth's atmosphere exposed perpendicularly to the rays of the Sun at the average distance between the Sun and earth is known as

What will technically happen if AC current enters an electrical appliance which uses DC current?

Q. Mention the usual current rating of the fuse wire in the line to (I) light and fan (ii) appliance of 2kw or more power

Q47. With reference to Li-Fi technology, consider the following statements: 1. It is a bidirectional technology that uses LEDs to transmit data using wires. 2. Its speed is faster than the speed of Wi-Fi. Select the correct answer using the codes given.

A ring has a total mass m but non-uniformly distributed over its circumference. The radius of the ring is R. A point mass m is placed at the center of the ring. Work done in taking away this point mass from center to infinity is

What is heating effect of electric current?

Methane can be harvested from

State whether true or false: An electron is a point charge.

If M is the mass of a nucleus and A its atomic mass, then the packing fraction is

Light travels through a glass plate of thickness t and refractive index n. If c is the velocity of light in vacuum, then the time taken by light to travel the thickness of the plate will be:

Question 10 Medicine is packed in boxes, each weighing 4 kg 500 g. How many such boxes can be loaded in a van which cannot carry beyond 800 kg?

Given the following molar conductivites at 25∘ C; HCl=426Ω−1 cm2 mol−1; NaCl=126Ω−1 cm2 mol−1, NaCro (sodium crotonate) =83Ω−1 cm2 mol−1. The conductivity of 0.001 mol/dm3 acid solution is 3.83×10−5Ω−1 cm−1. The dissociation constant of crotonic acid is

Resistors R1, R2 and R3 having values 5 Ω, 10 Ω, and 30 Ω respectively are connected in parallel across a battery of 12 volts. Calculate (a) the current through each resistor (b) the total current in the circuit and (c) the total circuit resistance

A cannon ball has a mass of 2 kg is fired at a target of 500 meters away. The 400 kg cannon recoils by 50 cm. Assuming cannon ball moves with constant velocity, when will it hit the target? (Resistance offered by ground to cannon is 100 N)

In which pH range our body works?

Question 13 The resistivity does not change if (a) the material is changed (b) the temperature is changed (c) the shape of the resistor is changed (d) both material and temperature are changed

Difference between voltage and electric current. Are they equal or same?

A body ‘A’ has 45 p+ and 52e- And a body B has 70p+ and 63e-. After friction find the total number of charge transferred between them and also find the charge before friction

Which of the following mirror(s) have curved reflecting surfaces?

Name the S.I. unit of electrical energy. How is it related to Wh?

Demonstrate the phenomenon of scattering with a help of an activity

How do I solve earthing circuit diagrams?

How is steam produced by fission of nuclei of uranium or plutonium ?

If the resistivity of a substance changes with temperature then why do we term it as a constant.

What is the difficulty faced by the mountaineers with respect to the air present around them?

The minimum speed of wind necessary for a small windmill to rotate and produce electricity is

Refractive Index of diamond is 2.4. What do you understand by this statement?

Question 3 An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be - (a) 100 W (b) 75 W (c) 50 W (d) 25 W

Complete the following sentences : (a) Mechanical advantage = ............ × velocity ratio (b) In class II leer, effort arm is ........ than the load arm. (c) A scissors is a ........ multiplier

If fifty pounds of force stretches a spring by five inches, how much will the spring be stretched by a force of 120 pounds?

The value of current flowing in a given resistor for the corresponding values of potential difference across the resistor are given below: I: 0.5, 1.0, 2.0, 3.0, 4.0 V: 1.6, 3.4, 6.7, 10.2, 13.2 Calculate the resistance of the resistor.

Two properties common to gamma radiations and visible light are:

In the arrangement shown in Figure, there are two coils wound on a non-conducting cylindrical rod. Initially, the key is not inserted. Then the key is inserted and later removed. Then

If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combinations is: (a) 0.1 Ω (b) 10 Ω (c) 20 Ω (d) 40 Ω

The use of one of the following is eco-friendly. This one is: (a) cars for transportation (b) polybags for shopping (c) windmills for generating power (d) dyes for colouring clothes

In the circuit given below: (a) What is the combined resistance? (b) What is the p.d. across the combined resistance? (c) What is the p.d. across the 3Ω resistor? (d) What is the current in the 3 resistor? (e) What is th current in the 6Ω resistor?

A p.d. of 4 V is applied to two resistors of 6Ω and 2Ω connected in series. Calculate: (a) the combined resistance (b) the current flowing (c) the p.d. across the 6Ω resistor.

In the diagram below, PQ is a ray of light incident on a rectangular glass block. In the diagram, the angle of incidence is marked by letter 'i' and the angle of emergence by the letter 'e’. How are the angles' i’ and 'e’ related to each other?

Name the factors on which the heat produced in a wire depends when current is passed in it and state how does it depend on the factors stated by you.