1
AIPMT 2010 Prelims
+4
-1
A 220 volt input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drwn by the primary windings of the transformer is
A
3.6 ampere
B
2.8 ampere
C
2.5 ampere
D
5.0 ampere
2
AIPMT 2010 Prelims
+4
-1
In the given circuit the reading of voltmeter V1 and V2 are 300 volts each. The reading of the voltmeter V3 and ammeter A are respectively

A
150V, 2.2A
B
220V, 2.2A
C
220V, 2.0A
D
100V, 2.0A
3
AIPMT 2009
+4
-1
Power dissipated in an LCR series circuit connected to an A.C. source of emf $$\varepsilon$$ is
A
$${{{\varepsilon ^2}\sqrt {{R^2} + {{\left( {L\omega - {1 \over {\omega }}} \right)}^2}} } \over R}$$
B
$${{{\varepsilon ^2}\sqrt {{R^2} + {{\left( {L\omega - {1 \over {C\omega }}} \right)}^2}} } \over R}$$
C
$${{{\varepsilon ^2}R} \over {\sqrt {{R^2} + {{\left( {L - {1 \over {C\omega }}} \right)}^2}} }}$$
D
$${{{\varepsilon ^2}R} \over {\left[ {{R^2} + {{\left( {L\omega - {1 \over {C\omega }}} \right)}^2}} \right]}}$$
4
AIPMT 2008
+4
-1
In an a.c. circuit the e.m.f. ($$\varepsilon$$) and the current

(i)  at any instant are given respectively by
$$\varepsilon$$ = E0sin$$\omega$$t,   $$i$$ = $$I$$0sin($$\omega$$t $$-$$ $$\phi$$)

The average power in the circuit over one cycle of a.c. is
A
$${{{E_0}{I_0}} \over 2}\cos \phi$$
B
$${{E_0}{I_0}}$$
C
$${{{E_0}{I_0}} \over 2}$$
D
$${{{E_0}{I_0}} \over 2}\sin \phi$$
EXAM MAP
Medical
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