The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The

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Question
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240 x 10^-6 N-m on full scale. If B = 1 Wb/m², range of meter is
Options
A. 1 mA
B. 2 mA
C. 3 mA
D. 4 mA

Correct Answer

2 mA

Explanation

NBAI = Controlling torque or

The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 2

= 240 x 10^-6 or I = 2 mA.

More questions

1. Assertion (A): Artificial transmission lines are frequently used in laboratories.
Reason (R): An artificial transmission line can be used to represent an actual line and can also be used as a delay circuit, as attenuator, as filter network etc.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

2. Match the following:

	List I		List II
A.	TTL	1.	Low propagation delay
B.	ECL	2.	Low power consumption
C.	MOS	3.	High packing density
D.	CMOS	4.	Saturated bipolar logic

Options
A. A-4, B-1, C-3, D-2
B. A-4, B-3, C-1, D-2
C. A-4, B-3, C-2, D-1
D. A-3, B-1, C-4, D-2

3. Match the following:

	List I (Memories)		List II (Characteristic)
A.	Static PLA	1.	erasable, programmable
B.	CCD	2.	ultra high speed
C.	ECL	3.	stores large volume of data
D.	GAL	4.	Does not need refreshing
		5.	Non-volatile

Options
A. A-4, B-3, C-2, D-1
B. A-4, B-2, C-3, D-1
C. A-5, B-1, C-2, D-3
D. A-3, B-5, C-2, D-1

4. The effect of source inductance in a 3 phase fully controlled bridge converter is to
Options
A. decrease the output voltage
B. increase the output voltage
C. decrease the output voltage and increase the output current
D. increase the output voltage and decrease the output current

5. Assertion (A): The reverse saturation current in a semiconductor diode is 4nA at 20�C and 32 nA at 50�C.
Reason (R): The reverse saturation current in a semiconductor diode doubles for every 10�C rise in temperature.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

6. Match the following:

	List I (Diode Rectifier)		List II (Expression for output voltage)
A.	Bridge	1.
B.	Half wave	2.
C.	Full wave using centre tapped transformer	3.

Options
A. A-1, B-2, C-3
B. A-3, B-2, C-1
C. A-1, B-3, C-2
D. A-3, B-1, C-2

7. Match the following:

	List I		List II
A.	n Channel JFET	1.
B.	p Channel JFET	2.
C.	Depletion MOSFET	3.
D.	Enhancement MOSFET	4.

Options
A. A-4, B-3, C-2, D-1
B. A-1, B-3, C-4, D-2
C. A-3, B-4, C-1, D-2
D. A-2, B-4, C-3, D-1

8. Assertion (A): Potentiometers can not be used as error detectors in position control systems.
Reason (R): The resolution of a potentiometer places an upper limit on its accuracy
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. R is correct but A is wrong

9. Match the following:

List I List II

A. 1.

B. 2.

C. 3.

D. 4.
Options
A. A-1, B-2, C-3, D-4
B. A-3, B-4, C-2, D-1
C. A-4, B-3, C-2, D-1
D. A-3, B-4, C-1, D-2

10. Match the following:

	List I (Digital circuit)		List II (Circuit type)
A.	BCD to 7 segment decoder	1.	sequential circuit
B.	4-to-1 MUX	2.	combinational circuit
C.	4 bit shift register	3.	neither sequential nor combinational circuit

Options
A. A-2, B-1, C-2, D-1
B. A-3, B-2, C-1, D-3
C. A-2, B-2, C-1, D-1
D. A-3, B-1, C-2, D-3

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