#### Electric Charge and Electric Current English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

9th Standard

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Science

Time : 00:10:00 Hrs
Total Marks : 10

Part A

10 x 1 = 10
1. Rubbing of comb with hair

(a)

creates electric charge

(b)

transfers electric charge

(c)

either (a) or (b)

(d)

neither (a) nor (b)

2. Potential near a charge is the measure of its________ to bring a positive charge at that point

(a)

force

(b)

abiility

(c)

tendency

(d)

work

3. In an electrolyte the current is due to the flow of

(a)

electrons

(b)

positive ions

(c)

both (a) and (b)

(d)

neither (a) nor (b)

4. Heating effect of current is called,

(a)

Joule heating

(b)

Coulomb heating

(c)

Voltage heating

(d)

Ampere heating

5. The following is not a safety device.

(a)

Fuse

(b)

Trip switch

(c)

Ground connection

(d)

Wire

6. Electroplating is an example for

(a)

heating effect

(b)

chemical effect

(c)

flowing effect

(d)

magnetic effect

7. In India the frequency of alternating current is

(a)

220 Hz

(b)

50 Hz

(c)

5 Hz

(d)

100 Hz

8. The resistance of a straight conductor is independent of__________

(a)

temperature

(b)

material

(c)

cross sectional area

(d)

shape of cross section

9. If in the circuit, power dissipation is 150 W, then R - is___________

(a)

2$\Omega$

(b)

6$\Omega$

(c)

5$\Omega$

(d)

4$\Omega$

10. Assertion (A) Electric current will not flow between two charged bodies when connected if their charges are same.
Reason (R) Current is the rate of flow of charge.

(a)

If both assertion and reason are true and reason is the correct explanation of assertion

(b)

If both assertion and reason are true but reason is not the correct explanation of assertion.

(c)

If assertion is true but reason is false

(d)

If assertion is false but reason is true.