1
JEE Main 2020 (Online) 6th September Evening Slot
+4
-1
A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit :
A
Ammeter is always connected in series and voltmeter in parallel
B
Both ammeter and voltmeter must be connected in series
C
Both ammeter and voltmeter must be connected in parallel
D
Ammeter is always used in parallel and voltmeter is series
2
JEE Main 2020 (Online) 6th September Evening Slot
+4
-1
In the figure shown, the current in the 10 V battery is close to :
A
0.36 A from negative to positive terminal
B
0.42 A from positive to negative terminal
C
0.71 A from positive to negative terminal
D
0.21 A from positive to negative terminal
3
JEE Main 2020 (Online) 5th September Evening Slot
+4
-1
In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point A is :
A
+2 V
B
-2 V
C
+1 V
D
-1 V
4
JEE Main 2020 (Online) 5th September Morning Slot
+4
-1
An electrical power line, having a total resistance of 2 $$\Omega$$, delivers 1 kW at 220 V. The efficiency of the transmission line is approximately :
A
85%
B
96%
C
72%
D
91%
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