MEDIUM
7th CBSE
IMPORTANT
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Three identical bulbs are connected as shown in the figure. Choose the correct statement about the below circuit.

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Important Questions on Electricity

HARD
7th CBSE
IMPORTANT

When a positively charged and another negatively charged bodies with equal magnitudes of charge are brought simultaneously in contact with the cap of a positively charged electroscope, then the strips

MEDIUM
7th CBSE
IMPORTANT

Match the entries given in column A with the appropriate ones in column B.

Column A Column B
(A) A battery (a) Good conductor
(B) Metal (b) Mechanical energy is converted into electric energy 
(C) A generator

(c) Question Image

(D) Filament bulb (d) Heating effect of electricity
(E) Ammeter

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MEDIUM
7th CBSE
IMPORTANT

Match the entries given in column A with the appropriate ones in column B.

Column A Column B
(A) A cell (a) Study of electric charges at rest
(B) Bulb (b) Close or open an electric circuit
(C) Static electricity (c) Substitute for fuse
(D) Switch

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(E) MCBs (e) Prevents unauthorised usage of current
(F) Main fuse at kW h meter (f) Converts chemical energy into electrical energy

 

EASY
7th CBSE
IMPORTANT

Two charged bodies, A and B, are suspended from a fixed point with the help of silk threads as shown in the figure. If A is positively charged, can we identify the nature of the charge on B?

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MEDIUM
7th CBSE
IMPORTANT

A negatively charged conducting sphere A and a neutral sphere B are kept on insulating stands and brought close to each other. The charge distribution is as shown in the figure. Is B charged? What type of force exists between A and B?

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HARD
7th CBSE
IMPORTANT

Raghvan found a metallic rod AB and a glass rod CD both positively charged and placed on an insulating table. He wanted to know what would happen to the charges on AB and CD if he touched both the rods at A and C? Discuss.

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HARD
7th CBSE
IMPORTANT

Two identical, small metallic spheres A and B are placed side by side on an insulating smooth table as shown in the figure. If A is positively charged and held fixed with the table, discuss the motion of B.

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MEDIUM
7th CBSE
IMPORTANT

Observe the circuit and state whether the cells are connected in series or parallel. If each cell is of e.m.f. 1.5 V, then find the total e.m.f. applied across the bulb connected.

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