At night plants take in X and animals take in Y, during breathing. Select the option that correctly identifies X and Y.
|B||Carbon dioxide||Carbon dioxide|
It was a little tricky .
Which of the following statements is/are true?
(i) In a wire, direction of flow of electron is same as direction of current.
(ii) Randomly moving electrons in a metal wire will start moving in a particular direction when a potential difference is applied across it.
(iii) In a cell, electrons move from negative electrode to positive electrode.
A (ii) and (iii) only
B (i) and (ii) only
C (iii) only
D (ii) only
Study the given flow chart carefully and select the correct option regarding it.
A A metal key can be placed at box H.
B A glass plate can be placed at box I.
C A floor tile can be placed at box J.
D A coin can be placed at box K.
how can a metal key stretch