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Physics 10th Class English Medium Unit 5 Online Test MCQs With Answers

Question # 1

The equivalent resistance in parallel combination is:

Choose an answer

R_c=R₁+R₂+R₃ +.................+R_n

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

a and b

None of these

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Question # 2

Mathematical formula of electromotive force (e.m.f) is:

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E = W/Q

E = Q/W

E = WQ

E = W2Q

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Question # 3

Which gate is used for safety alarm:

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AND

NANAD

NOR

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Question # 4

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

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Question # 5

Mathematical form of Ohm's law is:

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V = IR

V = I2R

V = Qt

V = IR2

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Question # 6

The resistance of voltmeter is:

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zero

low

Very high

10Ω

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Question # 7

LDR can act as:

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Diode

Switch

Transistor

Rectifier

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Question # 8

In mathematical form of Ohm's law, "R" is:

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Resistance

Specific resistance

Resistor

Resistivity

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Question # 9

Electric current in conductors is due to the flow of:

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Positive ions

Negative ions

Positive charge

Free electrons

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Question # 10

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

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Question # 11

The distance between principal focus and pole of mirror is called:

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Principal focus

Focal length

Aperture

Image

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Question # 12

Which we double the voltage in a simple electric circuit. We double the

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Current

Power

Resistance

both a and b

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Question # 13

When resistance are connected in series the current passing through them is .

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Different

Zero

The same

None of these

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