Question # 1

How Galvanometer is connected in circuit to detect current?

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In Series

In Parallel

Fixed

Variable

The equivalent resistance in parallel combination is:

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R_c=R₁+R₂+R₃ +.................+R_n

R_c=1/R₁+1/R₂+1/R₃+.................+1/R_n

a and b

None of these

What is the voltage across a 6Ω resister when 3A current passes through it?

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2V

9V

18V

36V

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror:

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-4.1 cm

-8.2 cm

-9.9 cm

-20 cm

The diameter of spherical mirror is called:

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Curvature

Aperture

Sphere

Both a and b

Joule's law is W = ____________________

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IR/t

IRt²

IR²t

I²Rt

The resistance of voltmeter is:

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zero

low

Very high

10Ω

Example of mechanical waves is:

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Radio waves

X-rays

Light waves

Sound waves

According to Ohm's law V =________

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I²R

IR²

IR

I/R

Current is equal to:

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IR²

CV

Q/t

IR

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

Aperture

A converging mirror with a radius of 20cm creates a real image 30 cm from the mirror. What is the object distance:

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5.0 cm

7.5 cm

15 cm

20 cm

The S.I unit of electric current is:

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Volt

Ampere

Coulomb

Watt

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