Two similar cells are used to light two similar lamps as illustrated in the diagrams above. In which of the circuit diagrams are the lamps brightest?
A. P B. Q C. R D. S Correct Answer: Option A A. PSix dry cells each of e.m.f. 2.0 and internal resistance of 1.0Ω are connected in parallel across a load of 3.0Ω. Calculate the effective current in the circuit
A. 0.63A B. 0.50A C. 0.31A D. .22A Correct Answer: Option A A. 0.63AThe sound heard by a person after the reflection of the sound generated by him is called?
A. reverberation B. resonance C. echo D. audibility Correct Answer: Option C C. echoWhich of the following properties is an advantage of lead-acid accumulator over an alkaline accumulator?
A. possesses low internal resistance B. can be recharges C. has a shorter life span D. possesses high e.m.f Correct Answer: Option D D. possesses high e.m.fWhen two like charges are brought together, the potential energy of the system formed will?
A. increase because work is done against the field B. increase because work is done by the field C. decrease because work is done by the field D. decrease because work is done against the field Correct Answer: Option D D. decrease because work is done against the...Products
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