Next Toppers - 12th Science
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NEXT TOPPERS CLASS 12th LIVE COURSESπŸ“–

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In an ideal transformer, the primary coil has 100 turns and the secondary has 200 turns. If the primary voltage is 220 V, the secondary voltage is:
Anonymous Quiz
22%
(a) 110 V
28%
(b) 220 V
46%
(c) 440 V
4%
(d) 880 V
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In an LCR series circuit, the power dissipation takes place only in:
Anonymous Quiz
14%
a) Inductor
20%
b) Capacitor
19%
c) Resistor
47%
d) All three elements
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At resonance, the current in a series LCR circuit is:
Anonymous Quiz
43%
a) Maximum
18%
b) Minimum
25%
c) Zero
13%
d) Constant
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The focal length of a concave mirror is 15 cm. What is its radius of curvature?
Anonymous Quiz
34%
A. 7.5 cm
10%
B. 15 cm
54%
C. 30 cm
1%
D. 45 cm
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