Which of the following statements is/are true?
(A) Three vectors not lying in a plane give zero resultant
(B) Three vectors lying in a plane can give zero resultant
(C) Two vectors of different magnitude can be combined to give a zero resultant
Statements (B) and (C)
Statements (A) and (C)
Statement (B)
Statement (A)
Bodies $P, Q, R, S$ are labelled as having charges $Q_P=0.5 \times 10^{-19} C, Q_Q=0.7 \times 10^{-19} C$, $Q_R=2.1 \times 10^{-19} C, Q_S=4.8 \times 10^{-19} C$ respectively.
Select the body having the correct charge.
[Given electronic charge $=e=1.6 \times 10^{-19} \mathrm{C}$ ]
$Q_Q=0.7 \times 10^{-19} C$
$Q_P=0.5 \times 10^{-19} C$
$Q_R=2.1 \times 10^{-19} C$
$Q_s=4.8 \times 10^{-19} C$
When metal of work function 1.4 eV is exposed to a radiation, the maximum kinetic energy of the electron emitted is 0.4 eV . The stopping potential required is:
1.4 V
2.8 V
0.4 V
0.2 V
Following graph shows four different processes, adiabatic, isothermal, isobaric and isochoric for an ideal gas, from the same initial state. Study the graph carefully and state which of the following statements is correct?

Process 2 is isobaric
Process 3 isochoric
Process 1 is isochoric
Process 4 is adiabatic
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