You are given a U shaped soft iron piece, insulated copper wire and a battery. Draw a circuit diagram to make a horse shoe electromagnet.

You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch. Draw a circuit diagram to represent the process.

You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch Label the poles of the electromagnet.

Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.

(a) Resistors given as R_(1), R_(2) and R_(3) are connected in series to a battery V. Draw the circuit diagram showing the arrangement. Derive an expression for the equivalent resistance of the combination. (b) If R_(1)=10 Omega, R_(2)=20 Omega and R_(3)=30 Omega , calculate the effective resistance when they are connected in series to a battery of 6 V. Also find the current flowing in the circuit.

Using the principle of Wheatstone Bridge, describe the method to determine the specific resistance of a wire in the laboratory. Draw the circuit diagram and write the formula used. Write any two important precautions you would observe while performing the experiment.

A coil of insulated copper wire is wound around a piece of soft iron and current is passed in the coil from a battery. What name is given to the device so obtained ? Give one use of the device mentioned by you.

Shows a wire of length l which can slide on a U- shaped rail of negligible resistance. The resistance of the wire is R. The wire is pulled ot the right with a constant speed v. Draw an equivalent circuit diagram representing the induced emf by a battery. Find the current in the wire usingj this diagram.

You are given a resistance wire AB connected with a cell and a key as shown in Fig. 9.14. You are required to measure the current in the wire AB and potential difference across it. Name the instruments that you would use and draw a labelled diagram to show how are they connected, Also mark the direction of current in each component.

You have following material : An ammeter ( 0-1A0 ,a voltmeter ( 0-3V) , a resistor of 20 Omega , a key, a rheostat, a battery of 3 V and seven connecting wires. Using this material draw a labelled circuit diagram to study the dependence of potential difference (V) across a resistor ont he current (I) passing through it.

The diagram shows a coil wound around a U shape soft iron bar AB. Suggest one way to strengthen the magnetic field in the electromagnet.