1. momentum will be conserved.
2.momentum will not be conserved.
3.at some places momenturii will be conserved and at some other places momentum will not be conserved.
4.none of these.
An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be
1.equal to its steady current
2.slightly higher than its steady current
3.slightly less than its steady current
1.the current through each resistance is same.
2.the voltage through each resistance is same.
3.neither current nor voltage through each re-sistance is same.
4.both current and voltage through each resis¬tance are same.
Combine three resistors 5 Q, 4.5 Q and 3 Q in such a way that the total resistance of this combination is maximum
In a potentiometer of 10 wires, the balance point is obtained on the 7th wire. To shift the balance point to 9th wire, we should
1. decrease resistance in the main circuit.
2. increase resistance in the main circuit.
3.decrease resistance in series with the cell whose emf is to be measured.
4. increase resistance in series with the cell whose emf is to be determined.
In a Wheatstone bridge if the battery and galvanometer are interchanged then the deflection in galvanometer will
1.change in previous direction
3. change in opposite direction
4.none of these.
1. more voltage
3. less voltage
The resistivity of alloy manganin is
1.Nearly independent of temperature
2.Increases rapidly with increase in temperature
3.Decreases with increase in temperature
4. Increases rapidly with decrease in temperature
When a metal conductor connected to left gap of a meter bridge is heated, the balancing point
1.shifts towards right
2. shifts towards left
4.remains at zero