In Q. No. 15, write the sign of `c` .

In Q. No. 14, write the sign of c .

In Q.No.89, write the sign of c

In Q.No.90, write the sign of c

Can oxygen exist as a gas at -273.15°C ? Write the significance of this temperature.

In Vaporisation of water, the signs of q and w are _____ and _____respectively.

Consider the situation shown in (figure) what are the signs of q_1 and q_2 ? If the lines are drawn in proportion to the charge, what is the ratio q_1/q_2 ?

Consider the situation shown in (figure) what are the signs of q_1 and q_2 ? If the lines are drawn in proportion to the charge, what is the ratio q_1/q_2 ?