Current Calculation | MCQs
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A. None of these
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B. 1 A
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C. 2.5 A
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D. 0.5 A
Explanation
The power (P) is given by:
P = VI
Given P = 100 W and V = 200 V, we can find the current (I):
100 = 200 × I
I = 100 / 200
= 0.5 A
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A. None of these
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B. 20A
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C. 2A
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D. 5A
Explanation
The total resistance (R) in the series circuit is:
R = 5 + 10 + 10
= 25 Ω
The current (I) is given by Ohm's law:
I = V/R
= 50V / 25Ω
= 2A
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A. 0.3 mA
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B. 0.3 A
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C. 3 mA
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D. 3 A
Explanation
Current (I) is defined as the rate of flow of charge (Q) with respect to time (t). The formula to calculate current is:
I = Q / t
Given:
Q = 90 C (charge)
t = 30 s (time)
I = 90 C / 30 s = 3 A
So, the current in the wire is 3 A.
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