A rectangular piece of land measure 0.7km by 0.5km. Each side is to be fenced with four rows of wires. What length of the wire is needed?

A rectangular piece of land measures 0.7 km by 0.5 km. Each side is to befenced with 4 rows of wires. What is the length of the wire needed?

A rectangular plot of land measures 150m by 250m. How much wire is needed in all if each side is to be fenced with three rows of wire?

A square piece of land has each side equal to 100m. If 3 layers of metal wire has to be used to fence it, what is the length of the wire needed?

A piece of land is in the shape of an equilateral triangle. Its boundary has to be fenced with barbed wire. What is the length of the barbed wire required?

The length of a rectangular field is twice its breadth. A man jogged around it 5 times and covered a distance of 3km. What is the length of the field?

The cost of a piece of cable wire is Rs.35/-. If the length of the piece of wire is 4 meters more each meter costs Rs. 1/- less, the cost would remain unchanged. What is the length of the wire ?

A wire of length 5m is twisted through 30^(0) at free end If the radius of wire is 1mm , the shearing strain in the wire is

A heater coil is to be constructed with a nichrome wire (rho = 1.0 xx 10^(-6) Omegam) which can operate at 500 W when connected to a 250 V supply. (a) What would be the resistance of the coil? (b) If the cross-sectional area of the wire is 0.5 mm^2 , what length of the wire will be needed? (c) If the radius of each turn is 4.0 mm , how many turns will be there in the coil?

A square wire of side 3.0 cm is placed 25 cm away from a concave mirror of focal length 10 cm . What is the area enclosed by the image of the wire ? The centre of the wire is on the axis of the mirror, with its two sides normal to the axis.

A rectangular conducting loop consists of two wires on two opposite sides of length l joined together by rods of length d. The wires are each of the same material but with cross-sections differing by a factor of 2. The thicker wire has a resistance R and the rods are of low resistance, which in turn are connected to a constant voltage source V_0 . The loop is placed in a uniform magnetic field B at 45^@ to its plane. Find tau , the torque exerted by the magnetic field on the loop about an axis through the centres of rods.