We have two wires A and B of same mass and same material. The diameter of the wire A is half of that B. If the resistance of wire A is 24 ohm then the resistance of wire B will be

If a wire of resistance R is melted and recasted to half of its length, then the new resistance of the wire will be

If potential $V equals 100 plus-or-minus 0.5 V o l t$ and current $I equals 10 plus-or-minus 0.2$ amp are given to us. Then what will be the value of resistance

The area of the quadrilateral formed by (2, -1) (4, 3), (-1, 2) and (-3, -2) is

An electron (charge = 1.6 $cross times$ 10^–19 coulomb) is moving in a circle of radius 5.1 $cross times$ 10^–11m at a frequency of 6.8 × 10¹⁵ revolutions/sec. The equivalent current is approximately

Two wires A and B of same material and same mass have radius 2rand r. If resistance of wire A is $34 capital omega$ , then resistance of B will be

In a neon discharge tube $2.9 cross times 1 0 to the power of 18 end exponent N e to the power of plus end exponent$ ions move to the right each second while $1.2 cross times 1 0 to the power of 18 end exponent$ electrons move to the left per second. Electron charge is $1.6 cross times 1 0 to the power of negative 19 end exponent C$ . The current in the discharge tube

A platinum resistance thermometer has a resistance of $50 capital omega$ at $20 degree C$ . When dipped in a liquid the resistance becomes $76.8 capital omega$ . The temperature coefficient of resistance for platinum is $alpha equals 3.92 cross times 1 0 to the power of negative 3 end exponent divided by degree C$ . The temperature of the liquid is

For a metallic wire, the ratio V/i (V= the applied potential difference, i = current flowing) is

The centroid of the triangle ABC is (2, 3) and A = (4, 2), B = (4, 5) then the area of the
triangle ABC

For such questions, we should know the relation between centroid and vertices of a triangle. We should also know the formula of area using vertices of at triangle.

The centroid of the triangle ABC is (2, 3) and A = (4, 2), B = (4, 5) then the area of the
triangle ABC

For such questions, we should know the relation between centroid and vertices of a triangle. We should also know the formula of area using vertices of at triangle.

The points (6, 8), (–2, 2) and (–6, –1) form

25 men were employed to do a piece of work which they could finish in 20 days, but the men drop off by 5 at the end of every 10 days. In what time will the work be completed?

A can complete a piece of work in 15 days. B can complete it in 10 days. With the help of C, they can complete the work in 4 days. They all worked together and earned a total of Rs. 750. Find C’s share

L.C.M is the least common multiple. We should know the concepts of work and wages.

A can complete a piece of work in 15 days. B can complete it in 10 days. With the help of C, they can complete the work in 4 days. They all worked together and earned a total of Rs. 750. Find C’s share

L.C.M is the least common multiple. We should know the concepts of work and wages.

Three persons A, B and C finished a piece of work. A worked at it for 5 days, B for 7 days and C for 9 days. Their daily wages are in the ratio of 4 : 3 : 2 and the total earning amounted to Rs. 118. What was the daily wage of A?

A and B can do a piece of work in 40 days while B and C can do it in 60 days. If A is twice as good a workman as C, then C alone will do the work in

For such questions, we should know the concept of work and efficiency.

A and B can do a piece of work in 40 days while B and C can do it in 60 days. If A is twice as good a workman as C, then C alone will do the work in