There is a current of 1.0 A in the circuit shown below. What is the resistance of P ?

When 'n' resistors of equal resistance (R) are connected in series and in parallel respectively, then the ratio of their effective resistance is ______________

An unknown resistance is connected in parallel with a 15\(\Omega \) resistance and a 12V battery. What is the value of the unknown resistance if the current in the circuit is 2A?

Kirchoff's I law i.e, \(\Sigma i=0\) at a junction, deals with the conservation of ______________.

Resistance increases with increases in temperature for _________________.

Joules's heating effect is desirable in ___________________.

The sensitivity of a potentiometer can be increased by ___________________.

Two identical resistors are connected in parallel then connected in series. The effective resistance are in the ratio ________________.

A resistance of a metal wire of length AB is 2\(\Omega \). Another wire of length PQ of the same metal with twice the diameter of the wire AB is found to have the same resistance of 2\(\Omega \). What is the length of PQ?

When a current of 5 A flows through a conductor of resistance 3 \(\Omega \) the loss of power due to joule heating effect is_________

When three resistors are connected in parallel then the value of the effective resistance is________

The algebraic sum of the currents meeting at any junction in the circuit is_______

Kirchhoff's law is applicable only for__________

Kirchhoff's I law is a consequence of__________

In the case of Wheatstone's Bridge the bridge balance condition will be obtained only when____

Define temperature coefficient of resistance.

What is Seebeck effect?

What is Peltier effect?

Define resistance.

Define the term electric power and circuit its SI unit.

What is (i) thermoelectric current?
(ii) thermocouple?

When resistors are connected in series the effective resistance is increased. Why?

When resistors are connected in parallel the effective resistance is reduced. Why?

Plot a graph showing the variation of circuit I various resistance R connected to a cell of emf E and internal resistance r.

Why are connecting resistors in a metre bridge made of thick copper strips?

Compute the current in the wire if a charge of 120 C is flowing through a copper wire in 1 minute.

Calculate the equivalent resistance in the following circuit and also find the values of current I, I₁ and I₂ in the given circuit.

Calculate the equivalent resistance between A and B in the given circuit.

Explain the equivalent resistance of a series and parallel resistor network.

Explain the determination of the internal resistance of a cell using voltmeter.

What is meant by electromotive force?

Derive a relation between internal resisance and emf of a cell.

In a circuit containing internal resistance r. Find the power delivered.

Find the expression for the equivalent emf & internal resistance of the series combination of cells.

Explain Peltier effect.

From the given circuit,

Find
i) Equivalent emf of the combination
ii) Equivalent internal resistance
iii) Total current
iv) Potential difference across external resistance
v) Potential difference across each cell

The following figure shows a complex network of conductors which can be divided into two closed loops like EACE and ABCA. Apply Kirchoff’s voltage rule(KVR)

Calculate the current that flows in the 1 Ω resistor in the following circuit.

In a Wheatstone’s bridge P = 100 Ω, Q = 1000 Ω and R = 40 Ω. If the galvanometer shows zero deflection, determine the value of S.

Three identical lamps each having a resistance R are connected to the battery of emf ε as shown in the figure.

Suddenly the switch S is closed.
(a) Calculate the current in the circuit when S is open and closed
(b) What happens to the intensities of the bulbs A, B, and C.
(c) Calculate the voltage across the three bulbs when S is open and closed
(d) Calculate the power delivered to the circuit when S is opened and closed
(e) Does the power delivered to the circuit decrease, increase or remain same?

Two cells each of 5V are connected in series with a 8 Ω resistor and three parallel resistors of 4 Ω, 6 Ω, and 12 Ω. Draw a circuit diagram for the above arrangement. Calculate
(i) the current drawn from the cells
(ii) current through each resistor

Calculate the effect internal resistance in series and parallel.

An aluminium wire of diameter 0.24 cm is connected in series to a copper wire of diameter 0.16 cm. The wires carry an electric current of 10 A. Determine the current density in aluminium wire.