A metal rod of mass 10 gm and length 25 cm is suspended on two springs as shown in Fig. 1.131. The springs are extended by 4 cm. When a 20 A current passes through the rod, it rises by 1 cm. Determine the magnetic field assuming acceleration due to gravity to be `10 ms^-1.`

A conducting rod of mass 1 kg and length 1 m is suspended by two strings, so as to remain horizontal. If 2T horizontal magnetic field is applied perpendicular to the length of the rod then what amount of current should be passed through this rod to remove tension in two strings ? (Take g = 10ms^(-2) )

When a body of mass 1.0 kg is suspended from a ceryain light spring hanging vertically, its length increase by 5 cm by suspending 2.0 kg block to the spring and if the block is pulled throughn 10cm and released, the maximum velocity in it in ms^-1 (Accesleration due to gravity = ms^-1 .

A metal rod of uniform thickness and of length 1m is suspended at its 25cm division with help of a string. The rod remains horizontally straight when a block of mass 2kg is suspended to the rod at its 10cm division. The mass of rod is

An iron rod of mass 50 g and length 50 cm is suspended by master wires as shown in the figure. Calculate the magnitude and direction of magnetic field to be set in the region such that the tension is the wires is zero. The current in the rod is 4 A.

A conducting rod of 1 m length and 1 kg mass is suspended by two verticle wires through its ends. An external magnetic field of 2T is applied normal to the rod. Now the current to be passed through the rod so as to make the tension in the wire zero is [Take g = 10 ms^(-2)]

A conducting rod of 1 m length and 1 kg mass is suspended by two verticle wires through its ends. An external magnetic field of 2T is applied normal to the rod. Now the current to be passed through the rod so as to make the tension in the wire zero is [Take g = 10 ms^(-2)]

A block of mass 20 kg is suspended through two light spring balances as shown in fig. Calculate the: (a) reading of spring balance (1), (b) reading of spring balance (2).

A block of mass 20 kg is suspended through two light spring balances as shown in fig. Calculate the: (a) reading of spring balance (1), (b) reading of spring balance (2).