Question # 1

The time period of frequency and time period is equal to:

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v

1

0

λ

Big unit of capacitance is:

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Farad

Volt

Watt

Coulomb

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

A large ripple tank with a vibrator working at a frequency of 30 Hz produces 25 complete waves in a distance of 50 cm.

The velocity of the wave is:

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53 cms^-1

60 cms^-1

750 cms^-1

1500cms^-1

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

The minimum value of angle of deviation is called:

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Minimum angle

Incident angle

Angle of minimum deviation

None of these

The unit of frequency is:

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Heartz

Vibration per second

Cycle per second

all a, b, c

The unit of potential difference is:

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Volt

Coulomb

Ampere

Joule

What should household appliances be connected in parallel with the voltage source?

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to increase the resistance of the circuit

to decrease the resistance of the circuit

to provide each appliance the same voltage as the power source

to provide each appliance the same current as the power source

waves whose speed is equal to speed of light are:

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X-rays

sound rays

electromagnetic waves

shock waves

Which device has two coils, primary and secondary?

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D.C. Motor

Transformer

A.C. genrator

a and b

The true ratio of a transformer is 10. It means:

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Vs = 10Vp

Ns = Np/10

Ns = 10NP

VS= Vp/10

Give the number of factors which affect the ability of a capacitor to store charge.

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2

3

4

5

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