Physics-
General
Easy
Question
The emf of a cell is 2 V and its internal resistance is 2 ohm. A resistance of 8 ohm is joined to battery in parallel. This is contacted in secondary circuit of potentiometer. If 1V standard cell balances for 100 cm of potentiometer wire, the balance point of above cell is
- 120 cm
- 240 cm
- 160 cm
- 116 cm
The correct answer is: 160 cm
Related Questions to study
Physics-
A potentiometer wire of 10 m length and 20Ohm resistance is connected in series with a resistance R Ohms and a battery of emf 2 V, negligible internal resistance. Potential gradient on the wire is 0.16 millivolt / centimeter then R is-ohms.
A potentiometer wire of 10 m length and 20Ohm resistance is connected in series with a resistance R Ohms and a battery of emf 2 V, negligible internal resistance. Potential gradient on the wire is 0.16 millivolt / centimeter then R is-ohms.
Physics-General
Physics-
When a conducting wire is connected in the left gap and known resistance in the right gap, the balance length is 75 cm If the wire is cut into 3 equal parts and one part is connected in the left gap, the balance length
When a conducting wire is connected in the left gap and known resistance in the right gap, the balance length is 75 cm If the wire is cut into 3 equal parts and one part is connected in the left gap, the balance length
Physics-General
Physics-
Two equal resistances are connected in the gaps of a metre bridge. If the resistance in the left gap is increased by 10%, the balancing point shift
Two equal resistances are connected in the gaps of a metre bridge. If the resistance in the left gap is increased by 10%, the balancing point shift
Physics-General
Physics-
In the circuit shown in the figure, the value of Resistance X, when potential difference between the points B and D is zero will be
In the circuit shown in the figure, the value of Resistance X, when potential difference between the points B and D is zero will be
Physics-General
Physics-
The electric current 'i' in the given circuit is
The electric current 'i' in the given circuit is
Physics-General
Physics-
The potential difference between points A and B is
The potential difference between points A and B is
Physics-General
Physics-
Find E for the Given Loop
Find E for the Given Loop
Physics-General
Physics-
The value of current I, in the figure shown will be
The value of current I, in the figure shown will be
Physics-General
Physics-
A student is asked to connected four cells of e.m.f of 1 V and internal resistance 0.5 ohm in series with an external resistance of 1 ohm. But one cell is wrongly connected by him with its terminal reversed, the current in the circuit is
A student is asked to connected four cells of e.m.f of 1 V and internal resistance 0.5 ohm in series with an external resistance of 1 ohm. But one cell is wrongly connected by him with its terminal reversed, the current in the circuit is
Physics-General
Physics-
If the external resistance is equal to the internal resistance of a cell of emf E. The p.d. across its terminal is
If the external resistance is equal to the internal resistance of a cell of emf E. The p.d. across its terminal is
Physics-General
Physics-
The temperature coefficient of resistivity of material is 0.0004/k. When the temperature of the material is increased by 50°C, its resistivity increases by 
. The initial resistivity of the material in ohm-m is
The temperature coefficient of resistivity of material is 0.0004/k. When the temperature of the material is increased by 50°C, its resistivity increases by . The initial resistivity of the material in ohm-m is
Physics-General
Physics-
The effective resistance between A and B in the given circuit is
The effective resistance between A and B in the given circuit is
Physics-General
Physics-
The effective resistance between A and B in the given circuit is
The effective resistance between A and B in the given circuit is
Physics-General
Physics-
The effective resistance between A and B in the given circuit is
The effective resistance between A and B in the given circuit is
Physics-General
Physics-
If a copper wire is stretched to increase its length by 0.1%. Then percentage of increase in its resistance will be
If a copper wire is stretched to increase its length by 0.1%. Then percentage of increase in its resistance will be
Physics-General
