1
GATE EE 2010
+1
-0.3
An ammeter has a current range of $$0$$-$$5A,$$ and its internal resistance is $$0.2\Omega$$. In order to change the range to $$0$$-$$25$$ $$A$$ we need to add a resistance of
A
$$0.8\,\Omega$$ in series with the meter
B
$$1.0\,\Omega$$ in series with the meter.
C
$$0.04\,\Omega$$ in parallel with the meter
D
$$0.05\,\Omega$$ in parallel with the meter
2
GATE EE 2005
+1
-0.3
A $$PMMC$$ voltmeter is connected across a series combination of a $$DC$$ voltage source $${V_1} = 2V$$ and $$AC$$ voltage source $${V_2}\left( t \right) = 3$$ $$sin(4t)$$ $$V.$$ The meter reads
A
$$2V$$
B
$$5V$$
C
$$\left( {2 + \sqrt 3 /2} \right)V$$
D
$$\sqrt {17} /2V$$
3
GATE EE 2004
+1
-0.3
A galvanometer with a full scale current of $$10$$ $$mA$$ has a resistance of $$1000$$$$\Omega$$. The multiplying power (the ratio of measured current to galvanometer current) of a $$100$$$$\Omega$$ shunt with this galvanometer is
A
$$110$$
B
$$100$$
C
$$11$$
D
$$10$$
4
GATE EE 2003
+1
-0.3
The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are
A
perpendicular
B
parallel
C
inclined at $${60^0}$$
D
inclined at $${30^0}$$
EXAM MAP
Medical
NEET