MCQ
When the velocity of body is variable, then
- AIts speed may be constant
- BIts acceleration may be constant
- CIts average acceleration may be constant
- ✓All of these
If velocity is changing they may change in magnitude or direction or both.
$(i)$ So, if velocity is changing in direction only the magnitude is constant so speed is constant.
$(ii)$ If only direction of velocity is changing and magnitude is constant then acceleration will also be constant in magnitude (in case of uniform circular motion).
$(iii)$ Average acceleration may be constant. $a_{ av }=\frac{v_2-v_1}{t_2-t_1}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| List $I$ | List $II$ |
| $(I)$ Two wires of same resistance are connected in series and same current is passed through them | $(A)$ $1:2$ |
| $(II)$ Two wires of resistance $R$ and $2R$ $ohm$ are connected in series and same $P . D .$ is applied across them | $(B)$ $4:1$ |
| $(III)$ Two wires of same resistance are connected in parallel and same current is flowing through them | $(C)$ $1:1$ |
| $(IV)$ Two wires of resistances in the ratio $1: 2$ are connected in parallel and same $P . D .$ is applied across the | $(D)$ $2:1$ |